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Receivables and Other Current Assets | 12 Months Ended
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Dec. 31, 2018
Deferred Costs Capitalized Prepaid Expense and Other Assets, Current [Abstract] |
Prepayment and other current assets [Text Block] |
16. RECEIVABLES AND OTHER CURRENT ASSETS
Receivables and other current assets consisted of the following: |  |  |  |
As at | December 31 | December 31
millions of Canadian dollars |  | 2018 |  | 2017
Customer accounts receivable – billed | $ | 844 | $ | 805
Customer accounts receivable – unbilled |  | 296 |  | 278
Allowance for doubtful accounts |  | (11) |  | (12)
Other receivables |  | 86 |  | 70
Capitalized transportation capacity (1) |  | 179 |  | 89
Income tax receivable |  | 175 |  | 24
Prepaid expenses |  | 42 |  | 59
Net investment in direct financing lease (note 20) |  | 9 |  | 8
Due from related parties (note 15) |  | - |  | 5
| $ | 1,620 | $ | 1,326
(1) Capitalized transportation capacity represents the value of transportation/storage received by EES on asset management agreements at the inception of the contracts. The asset is amortized over the term of each contract.

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